Centrifugal pipe-casting machine



June 12, 1928.- 1,673,028

J. H. UHRIG CENTRIFUGAL PIPE CASTING MACHINE Filed Nov. 23, 1926 2 Shets-Sheet 1 Fig E /MQMQ June 12, 1928.

J. H. UHRIG CENTRIFUGAL PIPE CASTING MACHINE Filed Nov. 23, 1926 2 Sheets-Sheet 2 TIM?! l atentecl June 12, 1928.

UNITED STATE S PATENT OFFICE.

JOHN H. UHRIG, OF BEVERLY, NEW JERSEY, ASSIGNOR TO UNITED STATES CAST IRON PIPE 8c FOUNDBY'GOMPANY, OF BURLINGTON, NEW J.I'EIB'SEY,..A CORPORA- TION OF NEW JERSEY.

CENTRIFUGAL PIPE-CASTING MACHINE.

Application filed November connected driving mechanism with a metal mold, the external conformation of which will approximately correspond with its 1nternal form and which will be without the usual radial flanges which I have found-to bring abouti-njurio'us strains in the metal of the mold.

The general nature of my invention as well as specific features thereof 'will be best understood as described. in connection with the drawings, which illustrate a centrifugal casting machine of the kind used in producing De Lavaud cast iron pipes and embodying the improvements which constitute my invention.

In thefldrawings, Figure 1 is a vertical elevation of the machine taken as on the line 11 of Fig. 2.

Figure 2 is an end view taken at the right hand side of Fig. 1 on a reduced scale, and

Figure 3 a sectional elevation on the line 2-2 of Fig. 1, also on a reduced scale.

A and A are respectively the upper and lower sections of the casing of the machine, in which is formed a water jacket for the mold; B is the mold, having as shown, a bell end at B and a spigot end 6 As shown, the mold, which is formed of a steel forging, is .formed with an end extension B const tuting a core seat and formed with radial n'otches lit to engage th drivmg dog to be described. B indicating key ho es also formed in the core seat. As shown, the mold is formed with a shoulder B and a peripheral groove B The mold ported in the casing ,on'

is rotatably su rollers indicate at I, I, and as shown, has

. secured to its spigot end by boltsindicated at M, a drum L, having packing grooves Z, Z,

formed in it, the packing in which, indi cated at P, forms a water the walls Oand O ,N is a terminal ring secured to the drum by bolts indicated at n. Y

tight joint with C is a driving ring, having, as shown, a

gear wheel C formed on it. and rotatably at the end of the casing.

23, 1926. Serial No. 150,207.

is also formed. with an outwardly extend ing flange C- adapted to fit against a hear: ing ring, indicated at R and fitting against aninwardly extending flan e J- of the casing, the end indicated at 5. The packing F forms a water tight joint between the shoulder B and the extension C. D is a ring secured to the extension C of the ring, as by bolts E, and having formed on it inwardly extending driving dogs D which extend into the notches B in the core seat extension of the mold. The ring D is also formed with an outwardly extending flange D which fits against the flange J Q indicates a driving gear engaged with the gear C K is the end Wall of the water jacket portion of the casing having as shown two inwardly extending portions K K against which fit packing rings In, formed as shown in a ring S, secured o the inner end of the ring C.

By preference and as illustrated in the drawing, the-connection between the driving ring and the mold is loose so that while the dogs D" engage the notches B andthus enable the gear ring C to drive the mold, the mold is quite free to expand and contract without. incurring any strains through its connection with the driving ring.

While I have illustrated whatI believe to be the best embodiment of my invention, I wish it-to be distinctly understood that I do not wish to be understood as in any way limiting my claims to the specific construction shown in the drawings. as my invention is clearly capable of being embodied in'many different forms of construction. 1

Having now described my invention, what .I claim as new and desireto secure by Letters Patent is:

-1'. A centrifugal pipe casting machine having in combination a mold, means support- ,ent means for supporting ing the mold for revolution on its longitudinal axis, a rotatable mold driving ringdocated near one end of the mold, independsaid ring so that the axis will approximately coincide with that of the mold, means for rotating said ring and means for coupling the driving ring to the end of the mold.

2. A centrifugal pipe casting machine having in combination a mold. means supporting the mold for revolution on its longitudinal axis, a rotatable mold driving ring located near one end of the mold. independent means for supporting said ring so that its axis will approximately coincide with that of the mold. means for rotating said ring and means for loosely coupling the driving ring to the end of the mold so as to leave the mold free to expand or contract without shifting the position of the driving ring.

3. A centrifugal pipe casting machine having in combination a metal mold, means supporting the mold for revolution on its longitudinal axis, a water jacket casing surrounding the body of the mold, a rotatable mold driving ring located near one end of the mold (independentmeans of supporting said ring so that its axis will approximately coincide with that of the mold, means for rotating aid ring and means for coupling the driving ring to the end of the mold.

4. A centrifugal pipe casting machine having in combination a metal mold, means sup porting the mold for revolution on its longitudinal axis,a water jacket casing surrounding the body of the mold, a rotatable mold driving ring located near one end of the mold, independent means for supporting said ringso that its axis will approximately coincide with that of the mold, means for rotating said ring and means for loosely coupling the driving ring to the end of the mold o as to leave the mold free to expand or contract without shifting the position of the driving ring.

5. In a centrifugal pipe casting machine a metal mold having an external conformation corresponding to its internal form and substantially without radial flanges at its ends, means supporting the mold for revolution on its longitudinal axis. a rotatable mold driving ring located near one end of the mold, means for supporting said ring so that its axis will approximately coincide with that of the mold. means for rotating said ring and means for loosely coupling the driving ring to the end of the mold so as to leave the mold end free to expand and contract.

G. In a centrifugal pipe casting machine a metal mold having an external conformation corresponding to its internal form and substantially without radial flanges at its ends, a core seat extension at the end of the mold formed with radial notches to engage driving dogs, means supporting the mold for revolution on its longitudinal axis, a rotatable mold driving ring located near one end of the mold, means ring so that its axis willapproximately coincide with that of the mold, means for rotatingsaid ring and means consisting of in wardly extending dogs secured to the end of the ring and engaged with the notches in the core seat for loosely coupling the ring to the mold.

JOHN HQ UHRIG.

for supportingsaid 

